Counter with several number drums on common shaft - has a number of transmission pinions also on a common shaft

摘要

The number drums have teeth engaged by those of the pinions in order to move forward by one step the next higher number drum, when the tens' switching teeth on the preceding drum engages the transmission pinion. Distance between the drum shaft and pinion shaft is variable and can be reduced to a minimum at least at the end of counting. One of the above shafts is supported in slotted holes inclined to the horizontal, so that the movable shaft moves under the influence of its own weight towards the other. Additional weights are provided on the movable shaft, or one or more springs press on the movable shaft towards the other.